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Our ISP told me my router is not at the same time with their, and they asked
me to set the time(or clock) in my router to synchronize with their devices.
otherwise the error will accumulate and cause the data link down.

then, how could I do per their said?

thanks in advance

Bruce Cao

On Mon, 06 Dec 2004 16:14:20 +0800, Bruce Cao wrote:

> Our ISP told me my router is not at the same time with their, and they asked
> me to set the time(or clock) in my router to synchronize with their devices.
> otherwise the error will accumulate and cause the data link down.
>
> then, how could I do per their said?
>
> thanks in advance
>
> Bruce Cao

Did they give you an ntp server IP address? If so, it might be as simple
as:

router#ntp server ntp-server-ip-address

You might also have to allow ntp through your firewall:

router#permit udp host their-ntpserver-ip-address eq ntp hostyour-router-ip-address eq ntp

put the above in your firewall inbound access list

Depending on your platform, you might also want to add:

router#ntp update-calendar

If their ntp server requires authentication, or uses broadcast to send update, see the cisco manuals.

Bruce Cao wrote:
> Our ISP told me my router is not at the same time with their, and they asked
> me to set the time(or clock) in my router to synchronize with their devices.
> otherwise the error will accumulate and cause the data link down.
>
> then, how could I do per their said?
>
> thanks in advance
>
> Bruce Cao
>
>

Are they talking about the clock that keeps up with time (I'd be shocked
if they cared), or the clock source on the serail interface (because
they see interface errors)?

--
-------------------------
Paul Stewart
Lexnet Inc.
Email address is in ROT13

Erik Freitag <> wrote:

> On Mon, 06 Dec 2004 16:14:20 +0800, Bruce Cao wrote:
>
> > Our ISP told me my router is not at the same time with their, and they asked
> > me to set the time(or clock) in my router to synchronize with their devices.
> > otherwise the error will accumulate and cause the data link down.
> >
> > then, how could I do per their said?
> >
> > thanks in advance
> >
> > Bruce Cao
>
> Did they give you an ntp server IP address? If so, it might be as simple
> as:
>
> router#ntp server ntp-server-ip-address
>
> You might also have to allow ntp through your firewall:
>
> router#permit udp host their-ntpserver-ip-address eq ntp
> hostyour-router-ip-address eq ntp
>
> put the above in your firewall inbound access list
>
> Depending on your platform, you might also want to add:
>
> router#ntp update-calendar
>
> If their ntp server requires authentication, or uses broadcast to send
> update, see the cisco manuals.

On my 837 running 12.3(11)T I have these options to my disposal:

cisco837(config)#sntp ?
broadcast Configure SNTP broadcast services
logging Enable SNTP message logging
multicast Configure SNTP multicast services
server Configure SNTP server

cisco837(config)#sntp server ?
Hostname or A.B.C.D Name or IP address of server

and I have to set the timezone using:

cisco837(config)#clock ?
initialize Initialize system clock on restart
save backup of clock with NVRAM
summer-time Configure summer (daylight savings) time
timezone Configure time zone

cisco837(config)#clock tim
cisco837(config)#clock timezone ?
WORD name of time zone

cisco837(config)#clock timezone Ehv ?
<-23 - 23> Hours offset from UTC

hope this helps,

Arnoud

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